Enter any address in Armstrong County, Pennsylvania to see its FEMA flood zone
Flash flooding from slow-moving storms is the dominant flood character in Armstrong County, PA. Recent events include flash flooding reported on May 4th and June 15th, 2025, where heavy rainfall in short periods led to significant inundation.
National Flood Insurance Program (NFIP) data shows a range of flood claim experiences across different zones. Zone A properties have seen an average of 212 claims with an average payout of $13,043 and water depths of 2.5 feet. Properties in Zone X, including X_UNSHADED and X_SHADED, have experienced fewer claims but with higher average payouts and water depths, reaching up to 7.4 feet in Zone X_UNSHADED. Properties in Zone UNKNOWN have had an average payout of $2,122 with 1.8 feet of water.
Homeowners in Zone A, as well as those in areas designated as Zone X, should pay particular attention to flood risk. Properties without a Base Flood Elevation (BFE) designation also warrant careful consideration due to the varied claim experiences.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
42 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Armstrong County, Pennsylvania has recorded 82 flood-related events since 1996 according to NOAA's Storm Events Database, including 51 flash floods and 31 river or area floods. The county has received 17 federal disaster declarations, 5 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1972–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Hurricane Sandy | Hurricane | Oct 26, 2012 |
| Severe Winter Storms And Snowstorms | Snowstorm | Feb 5, 2010 |
| Severe Storms, Flooding, And Mudslides | Severe Storm | Jun 23, 2006 |
| Hurricane Katrina | Hurricane | Aug 29, 2005 |
| Tropical Depression Ivan | Hurricane | Sep 17, 2004 |
| Severe Storms And Flooding Associated With Tropical Depression Frances | Severe Storm | Sep 8, 2004 |
| Severe Storms, Flooding, And Tornadoes | Flood | Jul 19, 1996 |
| Severe Storms And Flooding | Flood | Jan 19, 1996 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jun 15, 2025 | 5.00K |
| Flash Flood | Jun 15, 2025 | 2.00K |
| Flash Flood | May 4, 2025 | 0.00K |
| Flash Flood | Jul 1, 2025 | 5.00K |
| Flood | Apr 12, 2024 | 1.00K |
| Flash Flood | Apr 11, 2024 | 20.00K |
| Flash Flood | Apr 3, 2024 | 1.00K |
| Flash Flood | Apr 2, 2024 | 1.00K |
| Flash Flood | Apr 2, 2024 | 0.00K |
| Flash Flood | Mar 28, 2020 | 10.00K |
Flash Flood — Jun 15, 2025
Stationary boundary and near climatological max precpitable water led to another round of showers and thunderstorms with very heavy rainfall on the 15th. With weak steering flow, storms were allowed to train over one another, producing rainfall amounts in the 2-4 inches range in as little as an hour.
Flash Flood — May 4, 2025
Upper level low pressure was situated over the Middle Ohio Valley on May 4th. Spokes of mid-level vorticity rotating around the low supported the development of showers and thunderstorms. Although most of the activity remained sub-severe, there was one strong storm that generated a number of large hail reports between one and 2.5 inches in diameter, particularly in Indiana County. Later in the ...
Flash Flood — Jul 1, 2025
A mid-level trough, embedded shortwaves, and jet exit region dynamics provided necessary lift within an environment characterized by 1.7-1.9 precipitable water values to produce heavy, slow moving showers and thunderstorms that resulted in instances of flash flooding across western Pennsylvania.
Flood — Apr 12, 2024
A strong mid-level trough and an associated frontal zone crossed through the|Mid-South and took aim on the OH Valley. Strong forcing associated the energy aloft coupled with a gradually destabilizing boundary layer out ahead it set the stage for areas of locally heavy showers and thunderstorms for several hours and prompted dangerous flash flooding. A flash flood emergency was issued for portio...
Flash Flood — Apr 11, 2024
A strong mid-level trough and an associated frontal zone crossed through the|Mid-South and took aim on the OH Valley. Strong forcing associated the energy aloft coupled with a gradually destabilizing boundary layer out ahead it set the stage for areas of locally heavy showers and thunderstorms for several hours and prompted dangerous flash flooding. A flash flood emergency was issued for portio...
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Armstrong County, Pennsylvania:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Armstrong County, Pennsylvania that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.